168 Professor Mulder 



This combination is present in the substance obtained by the long 

 continued action of chlorine upon one of the above named substances. 

 Only when prepared from albumen, it yields exactly the above pro- 

 portion of hyposulphurous acid ; but when obtained from the solution 

 of fibrin, from which protein has been precipitated, it only contains 

 0*6 per cent, of sulphurous acid, and yet it consists of C'^'^H'-' N* 0^% 

 minus 1 or 2 equivalents of water, according as 1 or 2 equivalents of 

 chlorous acid have been taken up into the combination. 



I here subjoin the composition of chlorites of protein containing 

 hyposulphurous acid, as they are obtained from horse-hair, human- 

 hair, whalebone, and trioxide of protein, (Sclieck. Onderz. deel i., p. 

 265 ; deel ii., p. 403), according to my former results :— 



Chloride of protein prepared from the trioxide (former results) : — 



Atoms. 



You will perceive, that these old results agree even better with 

 the formula C^ H'^^ N* 0^^, than with the former I gave for protein. 

 The determination of chlorine is accompanied by several difficulties ; 

 and in some of my former results the quantity found was too small. 



I have obtained the following results by analysing compounds 

 which shewed no action upon silver when heated upon it with potash. 

 I have now dried them under the air-pump, over sulphuric acid, by 

 which means, if well prepared, they retain 2 equivalents of chlorous 

 acid. They are as follows : — 



From albumen, 



